class Request {
	constructor(options = {}) {
		// 请求的根路径
		this.baseUrl = options.baseUrl || ''
		// 请求的 url 地址
		this.url = options.url || ''
		// 请求方式
		this.method = 'GET'
		// 请求的参数对象
		this.data = null
		// header 请求头
		this.header = options.header || {}
		this.beforeRequest = null
		this.afterRequest = null
	}
	
	get(url, data = {}) {
		this.method = 'GET'
		this.url = this.baseUrl + url
		this.data = data
		return this._()
	}
	
	post(url, data = {}) {
		this.method = 'POST'
		this.url = this.baseUrl + url
		console.log(this.url);
		this.data = data
		console.log(this.data);
		return this._()
	}
	
	put(url, data = {}) {
		this.method = 'PUT'
		this.url = this.baseUrl + url
		this.data = data
		return this._()
	}
	
	delete(url, data = {}) {
		this.method = 'DELETE',
		this.url = this.baseUrl + url
		this.data = data
		return this._()
	}
	
	_() {
		// 清空 header 对象
		this.header = {}
		// 请求之前做一些事
		this.beforeRequest && typeof this.beforeRequest === 'function' && this.beforeRequest(this)
		// 发起请求
		return new Promise((resolve, reject) => {
			let weixin = wx
			// 适配 uniapp
			if('undefined' !== typeof uni) {
				weixin = uni
			}
			weixin.request({
				url: this.url,
				method: this.method,
				data: this.data,
				header: this.header,
				success: (res) => { 
					resolve(res) 
				},
				fail: (err) => { 
					reject(err) 
				},
				complete: (res) => {
					// 请求完成后做一些事情
					this.afterRequest && typeof this.afterRequest === 'function' && this.afterRequest(res)
				}
			})
		})
	}
}

export const $http = new Request()